166875645 has 16 divisors (see below), whose sum is σ = 268182720. Its totient is φ = 88606464.

The previous prime is 166875619. The next prime is 166875677. The reversal of 166875645 is 546578661.

It is not a de Polignac number, because 166875645 - 2⁶ = 166875581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166875594 and 166875603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21100 + ... + 27909.

It is an arithmetic number, because the mean of its divisors is an integer number (16761420).

Almost surely, 2^166875645 is an apocalyptic number.

166875645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166875645 is a deficient number, since it is larger than the sum of its proper divisors (101307075).

166875645 is a wasteful number, since it uses less digits than its factorization.

166875645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49244.

The product of its digits is 1209600, while the sum is 48.

The square root of 166875645 is about 12918.0356478839. The cubic root of 166875645 is about 550.5511224994.

The spelling of 166875645 in words is "one hundred sixty-six million, eight hundred seventy-five thousand, six hundred forty-five".